Ball-bearing.



K. SCHMIDT.

BALL BEARING.

APPLICATION FILED 001218, 1007,

926,294,, Patented June 29, 1909.

/ .lfxfarveeg KARL SCHMIDT, OF BEltLlN, GERMANY.

B ALL-BEARING.

\ Specification of Letters Patent.

fatented June 29, 1909.

Application filed October 18, 1907. Serial No. 398,003

To all whom it may concern:

Be it known that I, :KARL SCHMIDT, a subject of the King of Prussia,German Emeror, and resident of 77 Pallisadenst-ra sse, erlin, Kingdom ofPrussia, German Empire, have invented certain new and usefulImprovements in Ball-Bearings, otwhich the following is an exactspecification.

This invention relates to ball bearingsol -l the kind in which the ballsrun on a race.

formed by an inner and an outer complete ring, wheel part or the like.In such ball bearings there is danger ot-the balls falling out throughthe entrance groove or grooves or other entering meanswhich have beenfound necessary in this type of bearin The object of the presentinvention is to avoid the difficulties of falling out which were alwayspresent in hitherto known constructions and at the same time to enablethe use of rigid rings.

The construction of ball bearings accord-- ing to the present inventioncomprises an inner and an outer complete ring arranged concentricallywith balls between them and having entering grooves loading at an angleto the working grooves in said inner and outer rings respectively, theentering grooves being set on opposite sides of the working grooves oneach of the rings.

The invention is illustrated in the accompanying drawings which formpart of this.

specification and in which the invention is illustrated in one form byway of example. Figures 1 and 2 show detached views of the inner andout-er rings, the outer ring (Fig. 2) being in section. 3 shows themethod of entering the balls in a ball bearing constructed according tothis invention. Fig. e is a side view looking in the direction of thearrow X in Fig. 3. Fig. 5 is an outside-view of the ball bearingaccording to the present inventiomafter the parts are all assembled andthe dust c'overs set in lace.

In carrying the invention into e ect according to the example shown inthe drawings the outer ring a is provided with a working groove 9 and onentering groove 7 which is set at an angle to. the working oove g, butin the form shown. does not extend the whole way to the edgej of theringe. The inner ring 0 is also provided with a working groove a and onentering groove 6, the entering groove Z) being arranged aten angle tothe working groove a and extending toward the side is of the ring a. Theside is, as shown in Figs. 1 and 2, arranged opposite to the side 7 orthe outer ring when the two parts are assembled in the mannerwhich 1shereaiter described with reference to Figs.

3' and is.

- After the rings and balls are in place and distance pieces of anysuitable form, and indice-ted in dotted lines, are inserted betweenalternate pairs of balls, side rings m, which act as dust protectors areadded. These rlngs are iastened on each side of the bearing by means ofscrews and ferrules n which pass parallel to the axis of the bearmg and.

between the other alternate adjacent pairs po'ffballsn Thus the distancepieces are insorted between onefset of alternate adjacent pairs of ballsand the screws a are inserted between the remaining set of adjacentpairs of balls. This arrangement however does not form any part of thepresent invention and need not be further described. In the first placea number of the balls it say (3 as shown in Fi .1 hare placed in theworking groove of the outer ring 0. The inner ring 0 is then placed withits entrance groove 6 over the balls which have been placed in theWorking groove of the outer ring.- The inner ring thus takes up theinclined position (A-B) shown in F1g. 8 and some of the balls it rest inthe working groove a of the inner ring 0. The balls h are then insertedby meansof the entrance groove 7 in the outer ring e which lies directlyover the working groove (2 on the inner ring, when the two rings are inthe relative position shown in Figs. 1 and 2. The inner ring is thenrotated in the direction of the arrow Y in Figs. 3 and 4:, with theresult. that the balls come into the working grooves in both rings 0 ande and the inner ring comes into the same plane as the outer ring.

\Vhen the two ringsarc in one plane it will be seen that the ballscannot run into the entering grooves because the opposite wall of theworking groove on the other member is complete and even in the positionwhen both entering grooves are exactly opposite one another the ballscannot pass from their position in the working groove;

In this way there 'is provided in the ballbearing according to thisinvention a conr-' some cases the entrance grooves may be car llO . tothe ball race.

ht out to the edge ofthe inner and outer i gs but this is not advisableas in such cases dirt and'grit can readily gain Other modificationslight be made without departing from the invention.

Having thusti'dly c es ribed the nature of my invention, wl' at I desireto secure by Letters ?atent of the United States is 1. it call ringhaving in combination a having working groove on an entering groove atentering groove setat an angle thereto, said entering grooves beinginclined toward, but not "reaching to the opposite edges of the innerand outer members respectively, balls between said inner and outerrings, substantially as described.

3. A ball bearing having in combination, a complete ring having aworking groove on its outer surface and an entering groove v at an anglethereto, an outer ring having a working groove on its inner surface andan entering groove set at an angle thereto, and extending toward theopposite side of the bearing to that toward which the first mentionedentering groove inclines, balls between said inner and outer rings,dust-protecting rings for said balls, substantially as described.

In witness whereof I have hereunto set my hand in the presence of twowitnesses.

KARL SCHMIDT.

Witnesses /VoLomrAa HAUPT, HENRY Hasrnn.

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